Next two terms 5, 3, 1.8, 1.08

Guessing geometric

so

hmm

5 times what=3

divide both sides by 5

what=3/5

what=0.6

each term is multiplied by 0.6

so

1.08 times 0.6=0.648

0.648*0.6=0.3888

the next 2 terms are 0.648 and 0.3888